Buckle



FIG. 1 is a top, front, left side perspective view of a buckle showing my new design;

FIG. 2 is a bottom, rear, right side perspective view thereof;

FIG. 3 is an enlarged front elevation view thereof, the rear elevation view being a mirror image of the front elevation view;

FIG. 4 is a left side elevation view thereof, the right side elevation view being a mirror image of the left side elevation view;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for a buckle, as shown and described. 